Half to eobeet s



(No Model.) 2 Sheets-Sheet 1.

E. H. STONE.

SHAKING GRATE.

No. 323,969. Patented Aug. 11, 1885.

N. PEYERS. mmum m hnr, Walhinglon. nc.

2 SheetsSheet 2.

(No Model.)

4 E. H. STONE.

SHAKING GRATE.

Patented Aug. 11, 1885.

W/T/VE5EEEI WW @fl iJNiTED STATES PATENT Finch.

EDWARD H. STONE, OF EST BAY CITY, MICHIGAN, ASSIGNOR OF ONE- HALF TO ROBERT S. HANNAH, OF SAME PLACE.

SHAKING GRATE.

SPECIFICATION forming part of Letters Patent No. 323,969, dated August 11, 1885.

Application filed December 11, 1884. (No model.) 7

To all whom it may concern:

Be it known that I, EDWARD H. STONE, a citizen of the United States, residing at West Bay City, county of Bay, and State of Michigan, have invented certain new and useful Improvements in Shaking Grates; and I do hereby declare the following to be a description of the same, and of the manner of constructin g and using the invention in such full, clear, concise, and exact 'terms as to enable any person skilled in the art to which it appertains to construct and use the same, reference being had to the accompanying drawings, forming a part of the specification, the principle of the invention being herein explained, and the best mode in which I have contemplated applying that principle so as to distin guish it from other inventions.

My invention is of a shaking grate for use in furnaces, steamboats, locomotives, or elsewhere; and it consists in the construction and connection of th e various parts thereof, as hereinafter more fully described, and shown in the drawngs.

Figure 1 is a perspective view of the grate. Fig. 2 is a top plan view showing rockshafts and the side bars in position. Fig. 3 is a detail showing portions of the side bars in elevation. Fig. 4 is a detail view of a bar in position on the rock-shafts. Fig. 5 is an elevation of a single bar, showing the oblique teeth and oblique end shoulders. Fig. 6 is an elevation of the same reversed as to sides, showing the vertical teeth and the vertical shoulders.

A is the grate as seen as a whole. B B are two outer stationary bars of a set of bars which rest on legs 12 b. O O are intermediate bars and movable and detachable. D D are rock-sh afts, upon which the said movable bars rest, and by which they are moved. E is the lever-rod, which operates the rockshafts, said rod having its rear portion pivoted to the ear (2 on rocksha't't D, and having its forward portion provided with the two arms 6 e, the arm 0 being pivoted to lever shaft F and the arm 6 being pivoted to leg (I on rock-shaft l),said two arms pivoted to each other at 6. F is a lever-shaft turning on the pivot-bolt f, which passes through it from the upturned ear b on leg I) and into the'main upright portion of said leg, and f is the lever-handle.

The rock-shafts D D are respectively journaled in the legs I) b of the stationary bars B B. Said shafts are provided with cogs G, of suitable dimensions, alternating with each other in outward direction from the polar line of the shaft and diverging from each other at an angle, so that when one cog projects vertically its next alternate projects horizontally, and so on through the series, the shaft being so located that when a cog is vertical it always normally projects upward and never downward also, the corresponding cogs on the two shafts project in a corresponding di rection, whether vertically or horizontally, the horizontal direction being always rearward. Said cogs have their top edges rounded,tacilitating thereby their motion in contact with the grate-bars. Said bars are formed, as seen in Fig. 3, with a downward central swell, 7r, andpreferabl y of about one inch in top width, with a perfectly-smooth top, and provided on their sides with the teeth h h, the teeth It being vertical and teeth It being oblique, said teeth being on alternate sides, respectively of each bar, the bars being so placed on the rockshafts that the vertical teeth on one bar are contiguousto the oblique teeth onits next neighbor bar, and so on through the whole series of bars.

a The function of said teeth is to cut and grind to pieces the clinkerage of the fire, while the open grooves h between said teeth permit the fragments of the clinkers, well as the ashes, to fall down into the ash-pit. The oblique form of the .teeth h gives them increased leverage power over those that are directly vertical, while the series of vertical teeth provide more direct channels of discharge for the ashes and broken ciuders. Said bars have their ends provided, respectively, with open eyes If h, with hooked points its, one of said eyes located nearer to its end of the bar than is the other eye to its end of the bar. Seated on the shaft the end of a bar with eye 71 has for its next neighbor bar end on either hand, one with eye h, and so on alternately through the series. The bars thus seated and the shaft so rocked that the cogs in their separate series stand at about an angle of forty-five degrees from the vertical, the top faces of all thebars are brought into a level with each other, and also the cut ire series of bars thereby have their ends brought into a flush end line with each other. Also, by the said location of the eyes, and by the alternate seating of the bars in relation to said location of the eyes, in combination with the cogs located serially at an angle of ninety degrees from each other, as described, one bar has a longitudinal and an upward movement as the shafts are rocked, while at the same time its neighbor bar has a longitudinal and downward movement, thus producing a thorough shaking of the grate. The hooked points it of said eyes prevent the lifting of the bars from the cogs, as clinkers are caught by the teeth during the operation of shaking the grate, said hooked-points catch in g alternately on the cogs as said cogs change their position from vertical to horizontal, and vice versa.

Each grate-bar is provided with a central vertical shoulder, I, on each of its sides, respectively, said shoulder designed to bear against a similar shoulder on its neighbor bar, said bearing of the shoulders together being for the purpose of keeping the bars in an upright position; also, each bar, on its side that is provided with vertical teeth, has two additional vertical bearingshouldcrs, t', one near each end of the bar, fulfilling the same function as does shoulder I; and, on its opposite side, where the oblique teeth are located the same bar has the two oblique shoulders 71, answering the same purpose as do the vertical shoulders The intermediate bars, being detachable, are easily removed,when desired, to be replaced by others to be repaired, or for any other purpose.

I am aware that it is not new to have movable and detachable bars; also, it is not new to have bars with side teeth flush with the top of the bar; but the peculiarity of my in vcntion in this respect is, that the side teeth on one bar run angularly or transversely to the contiguous side teeth of its neighbor-bar.

Furthermore, in other shaking grates where the bars are loose or detachable, and with nothing to hold them in their normal place beyond their own weight and the weight of the incumbent fuel, they are exposed to be lifted and displaced by the resistance of the clinker-s as they are crushed by the teeth; but in my invention this exposure is entirely obviated by the means of the hooked form of the eyes, as described, said hooking points catching in with the cogs of the rock-shaft as said shaft is turned either way. The bars are detachable from the shaft only as the shaft is quiet, and in a special adjusted position therefor. 15y said interlocking of the bars with the cogs of the rock-shaft by said hooking-eyes provision is made for an unlimited manual leverage powcr upon the clinkers.

I preferably make my grate-bars of not more than an inch in width on top, which narrowncss tends to admitmore air between them than where the bars are wider, and also keeps the bars cooler than they otherwise would be, so adapting them to last the longer.

I set my gratebars in sections,preferably of fifteen or twenty bars in each section, but: am confined to no specified number, and as many sections may be used as it is desired. This said possible multiplicity of sections accounts for the stationary bars appearing in the drawings with teeth on both their sides. Also, in my sets or sections of bars I am not confined to any stationary bar or bars in any part of the section, but the entire set or section, if desired, may be detachable and movable.

hat I claim is 1. In a shaking grate, the combination, with movable bars having side teeth and a rockshaft on which said bars are seated, of an exterior side bar having interior side teeth arranged at an angle to the teeth on the contiguous side of the movable bar next to it in the series, substantially as set forth.

2. In a shaking grate, the combination, with stationary outside bars having, respectively, a smooth top and teeth on the interior side, and a rock-sh aft, of a series of smooth-top movable bars mounted on said shaft, the bars next to said outside bars having teeth on their sides contiguous to said outside bars, said teeth arranged at an angle to the contiguous teeth of the outside bars, substantially as set forth.

3. In a shaking grate, the combination, with a rock-shaft and a movable bar provided with lateral vertical teeth, of a movable bar provided with lateral oblique teeth, said vertical and oblique teeth located oppositely and 0011- tiguously to each other, substantially as set forth.

l. A grate-bar with a smooth top, having lateral teeth on both its sides, said teeth on one side of said bar being vertical, and said teeth on the other and opposite side of said bar being oblique, substantially as set forth.

5. In a shaking grate, the combination,with a rock-shaft, of a series of movable bars, each bar having one of its sides provided with a series of oblique teeth, and its other side provided with a series of vertical teeth, said bars so located in relation to each other that the oblique teeth of one bar will be contiguous and opposite to the vertical teeth of its adjoining bar, and so on through the series, substantially as set forth.

6. A grate-bar having a downward central swell, and provided on each of its sides with a central bearing-shoulder, said two shoulders being opposite to each other ona cross-line,

and said bar also being provided near each of a series of movable grate-bars, 0, each bar having open eyes k h, with hooked points If, one of said eyes located nearer to its end of the bar than is the other eye to its end of the bar, said bars seated upon the shafts alter nately with each other in reference to the said location of the eyes, substantially as setforth.

8. In a shaking grate, the combination of rock-shafts D D, leverrod E, having its rear end pivoted to ear d on D, and its forward end, 6, pivoted to lug d on D, and arm 6 pivoted t0 lever-shaft F, said lever-rod so pivoted this 5th day of December, A. D. 1884.

. EDWARD H. STONE. Witnesses SAMUEL L. BRIGHAM, W1LL H. MUNSHAM, T. R. DENISON. 

